This is a Next.js demo application showcasing the capabilities of the @nillion/blindfold cryptographic library.

The demo includes interactive pages for cryptographic operations:

1. Store: Encrypt and decrypt data using symmetric encryption or XOR secret sharing
2. Match: Perform equality comparisons on encrypted data without decryption
3. Sum: Add encrypted integers using homomorphic encryption or secret sharing
4. Decrypt: Decrypt shared encrypted data using provided shares and keys

• Node.js 20 or later
• npm or pnpm

npm install

npm run dev

Open http://localhost:3000 in your browser to see the demo.

Each demo page allows you to:

1. Select the number of nodes (1-10) using a slider
2. Choose key type (SecretKey with seed or ClusterKey)
3. Enter data to encrypt (strings or integers)
4. Encrypt the data with the selected configuration
5. Perform operations on the encrypted data
6. Decrypt the results to verify correctness

The Store page includes a sharing feature:

1. After encrypting data, click "SHARE ENCRYPTED DATA"
2. A new tab opens with the decrypt page containing the encrypted shares
3. Share this URL with others who have the decryption key/seed
4. Recipients enter the seed to decrypt the data

• Supports UTF-8 strings (up to 4096 bytes) and 32-bit signed integers
• Single node: Uses XSalsa20 stream cipher with Poly1305 MAC
• Multi-node: Uses XOR-based secret sharing
• Share encrypted data: Click "SHARE ENCRYPTED DATA" to open a decrypt link with the encrypted shares
• Supports both SecretKey (with deterministic seed) and ClusterKey

• Compare two encrypted values for equality
• Uses deterministic salted hashing (SHA-512)
• Equal plaintexts produce equal ciphertexts
• Supports both strings and integers

• Add encrypted 32-bit signed integers
• Single node: Paillier homomorphic encryption
• Multi-node: Additive secret sharing
• Compute sums without decrypting individual values

• Decrypt data shared from the Store page
• Accepts encrypted shares via URL parameters
• Visual node representation shows encrypted shares
• Requires the original seed for SecretKey decryption
• Supports editing shares if needed

The application uses:

• Next.js 15 with App Router
• TypeScript for type safety
• Tailwind CSS for styling
• @nillion/blindfold for cryptographic operations

• Blindfold Documentation
• Nillion Network